my name is aaron and im looking for help and/or suggestions. i have a green spyder aggressor but its just stock. i want to upgrade it to make it more powerful and have way better performance. i also want to make it look like an M4 or some type of military rifle. my problems with that is i dont know what to get to do that and i want a scope but the hopper is in the way for that so please help me out if you need pictures just ask and ill post some on this thread. thanks

you can't really make a paintball gun more "powerful." You can make it more consistent, efficient, accurate, etc. If you really want a military look, I'd just buy a new marker. By the time you buy magazines and stocks, you're going to spend a ton of money and you might as well have a new marker.

As far as other performance goes, I'd get a nice hopper and a better barrel to start. Also switching to compressed air will help your marker shoot better as well. Your choices are wide. Generally speaking, you get what you pay for. Also, scopes on paintball guns are pointless since paintball markers aren't very accurate.